Chain-wrench



(No Model.)

I M. QUINLAN.

CHAIN WRENCH.

No. 373,603. r Patented Nov. 22, 1887.

-the handle, showing a modification.

UNITED STATES ATENT Fries.

MAURICE QUINLAN, OF GLENDALE STATION, NEWV YORK.

CHAIN-WRENCH.

SPECIFICATION forming part of Letters Patent No. 373,603, dated November 22, 188).

Application filed March 24, 1887.

To-aZZ whom it may concern.-

Be it known that 1, MAURICE QUINLAN, of Glendale Station, Queens county, State of New York, have invented certain new and useful Improvements in Chain-\Vrenches, of which the following is a specification.

This invention relates to certain new and useful improvements in that class of wrenches constructed with curved serrated jaws and with a chain that encircles the pipe.

The object of my invention is to provide a new and improved chain-wrench which can be reversed very easily and rapidly, and in which the handle can be adjusted to any desired inclination to the jaws, thus facilitating the using of the wrench in narrow trenches.

The invention consists of the combination, with two jaws, of a handle between the same, which handle may be locked at different inclinations to the longitudinal axis of thejaws, and of a chain held between the jaws, all as will be fully described and set forth hereinafter, and finally pointed out in the claims.

In the accompanying drawings, Figure 1 is a side view of my improved chain-wrench. Fig.

- 2 is a horizontal sectional view. Fig. 3 is a longitudinal sectional view on thelineoc m, Fig. 2. Fig. 4 is a cross-sectional view on the line y Fig. 2. Fig. 5 isadetail top view of a part of the handle,showing a different construction of the hook. Fig. 6 is a detail side view ofpart of Fig. 7 shows a modified construction.

Similar letters of reference indicate corresponding parts.

The two jaw-plates A have curved serrated edges 13, the said plates being shaped approximately as shown. They are united by a bolt, 0, which is passed through an eye in the end of the handle-bar O, inserted between the plates. Said bolt 0 is also passed through the apertures in two links, E, which are placed on opposite faces of the handlebar O, as shown in Fig. 3, and between the swinging ends of said links one end of a link'chain, F, is fastened, thus adapting the link-chain to swing between the jaw-plates. The jaw-plates are also provided with a series of apertures, G,arranged on a semicircular or segmental line at the ends of the plates opposite those having the serrations, and the handle-baris provided Serial No. 232,227. (No model.)

with an aperture, H, the distance of which from the aperture in the end of the handle-bar is equal to the radius of the line of apertures G. A bolt, J, is passed through two corresponding aperturesG in the jaw-plates A, and through the aperture H of the handle-bar.

As shown in Fig. 6, the handle-bar O is provided with laterally-projecting prongs T, which are curved, and between which a longitudinal recess is formed for engagement with thelink of a chain, as shown in dotted lines in Fig. 6; or in place of this construction the construction shown in Figs. 1, 2, 3, and 5 may be used, which is as follows: On opposite faces of the handle bar links K are provided, through which the pin or bolt J also passes, and to the swinging ends of said links the forked hook L is pivoted, as shown in Fig. 5. Ordinarily, the jaws are held in such a position that their longitudinal axis is in line with thelongitudinal axis of the handle-bar, which is accomplished by passing the bolt through the middle aperture of each segmental row of apertures G, as shown in Fig. l. The link-chain F is passed around the pipe,upon which a serrated edge rests,and the chain drawn taut and then engaged with the forked end of the hook L or the'prongs T.

\Vhen it is desired to work in a narrow trench, the handle-bar must be at an inclination to the longitudinal axis of thejaw-plates. To accomplish this the bolt J is withdrawn, and the handle-bar is adjusted to the proper angle and locked in place by passing the bolt through corresponding apertures in the ban dle-bar and plates A. When it is desired to reverse theimplement,tl1e bolt Jis withdrawn, the handle removed and then reversed, so that the lugs T will project from the opposite side edge; or, in case the hook L is used, the links K are removed and placed on the other side of the handle-bar. The chain E need not be disengaged or detached for reversing the implement.

The same tool may be used for large and small pipes, as the chain can be drawn taut and held at any desired length by the forked hook L. In place of providing the apertures G, a series of parallel radial ribs forming pockets, as shown at M, may be provided on the inner sides of thejaws. The bolt Jis used to hold the jaw- 2 erases plates together, and also to hold the fixed end of the chain. The handle is not pivoted on the jaws, but is inserted between different pairs of ribs, according to the desired angle of inclination of the same to the jaws.

Having thus described 1nyinvention,l claim plates, and means forholding the free end of the chain, substantially as shown and described.

3. In a pipe-Wrench, the combination, with two jaw-plates having a circular or segmental row of apertures on one end, of an adjustable handle held between the jaw-plates by a bolt at the center of the circle of the circular or segmental row of apertures, and of a bolt passed through an aperture in the circular row of apertures and an aperture in the handle-bar, substantially as shown and described.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

MAURICE QUINLAN. 

